4528 Dual Monostable Circuit

Wondering if i can get some assistance for a task i have been given for uni, it is supposed to help coming into the exam. So the information is limited i am finding on this but we are asked to "Use a single 4528 Dual Monostable to construct an astable circuit with a mark-space ration of 0.5 and times of the order of 1 to 2 seconds, Put indicating LED's on the circuit to indicate both times."

So far (my understandings) are that one monostable could possibly trigger the other monostable to give the appropriate waveforms & the mark-space time means the high time to the low time.

Any help on this would be appreciated. I have attached the 4528 data sheet for reference.

Thanks

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Wondering if i can get some assistance for a task i have been given for uni, it is supposed to help coming into the exam. So the information is limited i am finding on this but we are asked to "Use a single 4528 Dual Monostable to construct an astable circuit with a mark-space ration of 0.5 and times of the order of 1 to 2 seconds, Put indicating LED's on the circuit to indicate both times."

So far (my understandings) are that one monostable could possibly trigger the other monostable to give the appropriate waveforms & the mark-space time means the high time to the low time.

Any help on this would be appreciated. I have attached the 4528 data sheet for reference.

I know your professor is asking you to do it with this particular chip so you have to give this some thought. From my point of view, however, I would tell him I would use a 4528 to make this circuit by taking the 4528 to a local HAM swap meet and trading it for a CD4047 or a 555 timer and build a circuit scoring to the datasheet.

Anyhow, you are on the right track with the two in a loop - re triggering each other. You just need a push button to start it off.

So i have found how the circuit should work and the led part of the circuit is sorted. As for the "mark-space ration of 0.5 and times of the order of 1 to 2 seconds", i am not exactly sure what is meant by that? With an order of say 1 second, i assuming the mark space ratio should be 0.5 seconds.

By using the K*R1*C1 to equal 0.5 seconds should covered that off? I have found the K value to be 0.32 when Vcc is +10V and assuming value for C1 is 220uF

Cheers

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So i have found how the circuit should work and the led part of the circuit is sorted. As for the "mark-space ration of 0.5 and times of the order of 1 to 2 seconds", i am not exactly sure what is meant by that? With an order of say 1 second, i assuming the mark space ratio should be 0.5 seconds.

By using the K*R1*C1 to equal 0.5 seconds should covered that off? I have found the K value to be 0.32 when Vcc is +10V and assuming value for C1 is 220uF

Hi,
How did you get the answer 0.5 out of that equation K*R1*C1? How do we define K in this case? And what does the "times of the order of 1 to 2 seconds" have to do with the outcome frequency?
Sorry to ask this much but I'm also struggling with this same problem.